''Polymetme thaeocoryla'' is a

species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...

of fish in the family Phosichthyidae (lightfish). Its specific name is an anagram of the similar species, ''

Polymetme corythaeola The rendezvous fish (''Polymetme corythaeola'') is a species of fish in the family Phosichthyidae (lightfish). Its specific name is derived from the Greek κόρυθος (''korythos'', "helmet"); and αἰόλος (''aiolos'', "glittering"). D ...

''. It has no common name in English, but in Spanish is called ''luciérnaga musculosa'' ("muscular lightfish") and in French ''luisant grand feu'' ("gleaming ish ofgreat fire").

Description

''Polymetme thaeocoryla'' has a dark dorsum, with silver flanks and a black pigment on the outer caudal rays. Its length is maximum . It has 12 or 13 dorsal soft rays, 30–34 anal soft rays, 44 or 45

vertebrae Each vertebra (: vertebrae) is an irregular bone with a complex structure composed of bone and some hyaline cartilage, that make up the vertebral column or spine, of vertebrates. The proportions of the vertebrae differ according to their spinal ...

, 7 or 8 pyloric caeca and 17–19 photophores above the

anal fin Fins are moving appendages protruding from the body of fish that interact with water to generate thrust and help the fish swim. Apart from the tail or caudal fin, fish fins have no direct connection with the back bone and are supported o ...

Habitat

''Polymetme thaeocoryla'' is benthopelagic, living in the

Atlantic Ocean The Atlantic Ocean is the second largest of the world's five borders of the oceans, oceanic divisions, with an area of about . It covers approximately 17% of Earth#Surface, Earth's surface and about 24% of its water surface area. During the ...

at depths of .

Behaviour

Nothing is known of its early life stages.

References

Phosichthyidae Fish described in 1990 Taxa named by Nikolai Vasilyevich Parin Taxa named by Oksana Dmitrievna Borodulina {{Stomiiformes-stub